Abstract:In the HCl medium, rhenium (VII) or Re nanoparticles exhibited strong catalytic effect on the slow Te particle reaction between Te(VI) and Sn(II) at 70°C. The product of formed Te particles shows two strong resonance Rayleigh scattering peaks at 778 nm and 540 nm. The RS intensity at 778 nm enhanced linearly with Re concentration. The enhanced RS intensity was linear Re concentration in the range of 0.01–2.0 nmol·L−1, with a detection limit of 0.005 nmol·L−1Re. This method was applied to the analysis of Re in … Show more
Water photolysis is a key technology to convert solar energy into clean, sustainable fuel. Hematite Fe2O3 thin films are considered as a potential photoanode for this purpose. The performance of hematite‐based devices is limited by charge carrier transport and recombination, which are intimately linked to the electronic structure. Investigations of the electronic structure of hematite by photoemission exhibit pronounced differences in the reported spectra. A combination of structural and spectroscopic characterization methods is used to unravel the relation between the crystalline and the electronic structure of hematite thin films, which provides unique fingerprint spectra for different crystalline states. The combination with valence band DOS calculations from literature allows for an assignment of the contribution of iron and oxygen (hybrid‐) states to the valence band DOS.
Water photolysis is a key technology to convert solar energy into clean, sustainable fuel. Hematite Fe2O3 thin films are considered as a potential photoanode for this purpose. The performance of hematite‐based devices is limited by charge carrier transport and recombination, which are intimately linked to the electronic structure. Investigations of the electronic structure of hematite by photoemission exhibit pronounced differences in the reported spectra. A combination of structural and spectroscopic characterization methods is used to unravel the relation between the crystalline and the electronic structure of hematite thin films, which provides unique fingerprint spectra for different crystalline states. The combination with valence band DOS calculations from literature allows for an assignment of the contribution of iron and oxygen (hybrid‐) states to the valence band DOS.
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